Blue Seal E1100 User manual

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Revision 4/F3591 © Moffat Ltd, August 2004
SERVICE MANUAL
E1100 ELECTRIC
CONVECTION OVEN

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Revision 4/F3591 © Moffat Ltd, August 2004
WARNING: ALL INSTALLATION AND SERVICE REPAIR WORK MUST BE CARRIED
OUT BY QUALIFIED PERSONS ONLY.

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Revision 4/F3591 © Moffat Ltd, August 2004
CONTENTS
This manual is designed to take a more in depth look at the E1100 electric convection oven for the
purpose of making the unit more understandable to service people.
There are settings explained in this manual that should never require to be adjusted, but for
completeness and those special cases where these settings are required to change, this manual
gives a full explanation as to how, and what effects will result.
SECTION PAGENO.
1. SPECIFICATIONS......................................................................................................... 5
2. INSTALLATION ............................................................................................................ 8
3. OPERATION .................................................................................................................. 10
3.1 Description of Controls
3.2 Explanation of Control System
4. MAINTENANCE............................................................................................................. 13
4.1 Cleaning
4.2 Routine Procedures
5. TROUBLE SHOOTING GUIDE ..................................................................................... 14
6. SERVICE PROCEDURES ............................................................................................. 17
6.1 Fault Diagnosis
6.2 Access
6.3 Replacement
6.4 Adjustment / Calibration
7. CIRCUIT SCHEMATIC .................................................................................................. 32
8. ELECTRICAL WIRING DIAGRAM................................................................................ 33
9. SPARE PARTS.............................................................................................................. 34
10. PARTS DIAGRAMS ...................................................................................................... 35
10.1 Main Assembly
10.2 Control Panel Assembly
10.3 Ignition Electrode Assembly
11. SERVICE CONTACTS .................................................................................................. 39
APPENDIX A. DOUBLE STACKING INSTRUCTIONS......................................................... 41
IMPORTANT: MAKING ALTERATIONS MAY VOID WARRANTIES AND APPROVALS.

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Revision 4/F3591 © Moffat Ltd, August 2004
MWS 3E
205
1005
190
310
ELECTRICAL ENTRY
MWS
3E
1200
1390
660
930
75
50
3E
WATER ENTRY
MWS
1. SPECIFICATIONS
MODEL: E1100
Dimensions shown in millimetres.
FRONT SIDE
LEGEND
- Electrical connection entry point
- Water entry - ¾” BSP hose connection
PLAN

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285
770
1690
230
930
75
50
730
E
3
WATER ENTRY
E
3
MWS
MWS
ELECTRICAL ENTRY
205
MWS
E
3
E
3
1005
310
MWS
MWS E
3
MODEL: E1100-2
Dimensions shown in millimetres.
LEGEND
- Electrical connection entry point
- Water entry - ¾” BSP hose connection
FRONT SIDE
PLAN

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Revision 4/F3591 © Moffat Ltd, August 2004
LOCATION
The following minimum clearances for air
openings, servicing, operation and installation
are to be adhered to:
Rear 100 mm
Left-hand side 100 mm
Right-hand side 300 mm
OVEN INTERNAL DIMENSIONS
Width 730 mm
Height 490 mm
Depth 600 mm
Oven Volume 0.21 m³
OVEN RACK SIZE
Width 710 mm
Depth: 520 mm
ELECTRICAL SUPPLY SPECIFICATION
400-415 V AC, 50 Hz, 10.4 kW, 3P+N+E
380V AC, 60Hz, 10.4kW, 3P+N+E
WATER SUPPLY CONNECTION
Max Pressure 550 kPa / 5.5 bar / 80 psi
Min Pressure 100 kPa / 1.0 bar / 15 psi

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Installations must be carried out by authorised
persons only. Failure to install equipment to
the relevant codes and manufacturers
specifications in this section will void warranty.
This oven must be electrically grounded in
accordance with local codes.
BEFORE CONNECTION TO POWER
SUPPLY
Unpack and check unit for damage and report
any damage to the carrier and dealer. Report
any deficiencies to your dealer.
Fitting legs
Tilt the oven over on one side and fit both the
front and rear legs to the side now off the
ground. Fit them into the base frame under
the chassis base and secure to the base with
the bolts, spring washers and flat washers
provided. Lift up the other side of the oven, fit
legs, bolts and washers, but do not tighten
yet. Position leg tray (flat side facing up)
between legs and secure with the 4 screws
provided, then tighten all leg bolts. Level the
oven by adjusting the feet.
NOTE: Double units have no leg tray.
Stacking the ovens (Double units only)
Lay the top unit on its side and fit the spacers
provided to the base of the oven.
Lift the top unit onto the bottom unit and
secure around the spacer panel flanges with
self-tapping screws provided. Fit chimneys
over the duct assembly of the bottom unit.
Screw in place and pull down chimney
surrounds onto the duct assembly. Level the
oven by adjusting the feet. (Refer to appendix
A for more detailed stacking instructions).
LOCATION
The following minimum clearances for air
openings, servicing, operation and installation
are to be adhered to:
2. INSTALLATION
WARNING: THIS APPLIANCE MUST BE EARTHED / GROUNDED.
Rear 100mm / 4”
Left-hand side 100mm / 4”
Right-hand side 300mm / 12”
NOTE: 300mm is required at the right hand
side of the oven to allow access to the
circuitry and gas connections. If space is
limited then a minimum of 100mm (4”)
clearance should be allowed for, provided
that the oven can be moved to gain
access.
Position the oven in its allocated working
position. Use a spirit level to ensure the oven
is level from side to side and front to back. (If
this is not carried out, uneven cooking could
occur). The feet/legs used with bench or floor
mounting or provided with stands are
adjustable and will require adjusting in
levelling the unit. It should be positioned so
the operating panel and oven shelves are
easily reachable for loading and unloading.
ELECTRICAL CONNECTION
This E1100 convection oven can be supplied
as a single or twin deck unit. Check that the
available power supply is correct to that
shown on the rating plate located on the right-
hand side panel.
400-415V AC, 50Hz, 3P+N+E, L1 14.5A
L2 14.4A
L3 13.7A
380V AC, 60Hz, 3P+N+E L1 15.9A
L2 15.8A
L3 15.0A
The mains terminal block is positioned at the
rear of the unit. Access is provided by a
detachable panel on the back panel. Each
oven should be connected to a circuit breaker
(or switch and fuses). These should be
mounted on the wall adjacent to the oven and
should be readily accessible and clearly
marked.
Bring the connecting cable up through the
base panel and tighten the conductor strands
securely to the terminal block studs. The
earth screw is located in the base panel next
to the cable entry hole.
WARNING: ALL INSTALLATION AND SERVICE REPAIR WORK MUST BE CARRIED
OUT BY QUALIFIED PERSONS ONLY.

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WATER CONNECTION
A cold water supply should be fitted to the
water inlet which is located at the rear of the
unit.
To access the water solenoid, undo the 4
screws securing the water access cover
panel, and remove the panel.
Fit ½" (13mm) flexible hose to the solenoid
and secure with a hose clamp. Turn on the
water supply to check for leaks. It may be
necessary to hold the water injection button in
for a few seconds to remove air from the
system after initial instalment.
IMPORTANT: MAXIMUM INLET WATER
PRESSURE IS 550 kPa / 80 psi.
BEFORE USE
Operate the oven for about 1 hour at 200°C to
remove any fumes or odours which may be
present.
RATING PLATE LOCATION
The rating plate for the E1100 convection
oven is located at the bottom left of the right
hand side panel. An internal rating plate is
located behind the control panel on the LH
side (Units manufactured from July 2002).
Rating
Plate
Figure 2.1
Internal Rating
Plate

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3.1 DESCRIPTION OF CONTROLS
2. THERMOSTAT
Temperature range 50 - 320°C.
Indicator illuminates when elements are
cycling ON to maintain set temperature.
3. BAKE TIMER
1 Hour bake timer.
(Indicator illuminates when “time up” (0)
reached, and buzzer sounds).
6. STEAM SWITCH
Push switch to activate water injection
(Water injects into oven while the button is
depressed).
1. POWER SWITCH
Turn on to switch power on or off (indicator
illuminates when power is on).
5. ROAST TIMER
3 Hour roast timer.
(Indicator illuminates when “time up” (0)
reached, and product held at 75°C).
7. LIGHT SWITCH
Push switch to activate lights.
(Lights illuminate while button depressed).
4. ROAST N HOLD SWITCH
Turn on to activate ’ROAST N HOLD’
function (Switch illuminates when ON).
3. OPERATION
NOTE: A full user’s operation manual is supplied with the product and can be used for further
referencing of installation, operation and service.
1
2
3
5
6 7
4

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3.2 EXPLANATION OF CONTROL
SYSTEM
The E1100 Turbofan convection oven
features multi-function operator controls for
which a correct understanding of their
operation is required before carrying out any
service or fault repair work. The control
device functions are explained as follows:
A power switch on the control panel isolates
all to the controls of the oven. With the power
switch Off all functions of the oven are
inoperable.
With the power switch On (indicator
illuminated) power is directly supplied to the
60 minute bake timer, steam (water injection)
switch, light switch, and the temperature
control circuit. The oven circulation fan will
operate only when the thermostat is turned on
and the oven door is closed. The control
panel light switch will turn the oven lights on
when the door is closed only when the light
switch is held in. With the thermostat
switched on, the oven lights will come on
automatically when the door is opened, as this
is controlled by the door microswitch.
The 60 minute timer is a mechanical timer and
can therefore be operated with the oven’s
power switch On or Off. However, only with
the oven’s power switch On will the switch
contacts of the 60 minute timer turn on the
time-up buzzer and illuminate the time-up
indicator on the control panel. The buzzer
and time-up indicator provide indication that
the time setting has run down to zero and at
this point will remain On continuously until the
60 minute timer has been manually set back
to the Off (vertical) position. The 60 minute
timer does not control any other part of the
oven’s operating system as this timer is
independent of the temperature control and
heating system.
The steam (water injection) switch on the
control panel can be operated whenever the
power switch is On. The switch is momentary
like the light switch and when depressed, will
operate the electric solenoid valve at the rear
of the oven and inject water across the oven
fan from the flat spray (vertical) nozzle
positioned at the rear of the oven. Releasing
the steam button will close the solenoid valve.
This feature is used to instantaneously add
steam into the oven.
The temperature control of this oven is with a
capillary type thermostat which can be set to a
required cooking temperature.
The thermostat switch has a separate switch
body assembled onto the front from the shaft
assembly and when the thermostat is set to a
cooking temperature, the switch contacts turn
on the oven fan. The switch is closed (fan on)
whenever the thermostat is not in the Off
(vertical) position. The control panel indicator
light to the right of the thermostat knob cycles
On and Off with the thermostat to indicate
when the elements are on and the oven is
heating.
The E1100 Turbofan convection oven has 9.9
kW of electric heating elements, comprising of
three 3.3kW elements at the rear of the oven.
The elements are switched on and off by the
main oven thermostat or hold thermostat via a
four-pole 25 Amp contactor located inside the
control housing. Only three poles of the
contactor are used, one for each element coil.
The E1100 Turbofan convection oven
features a Roast-and-Hold system which can
be used to automatically set the oven to a
fixed holding temperature at the end of a
timed cooking period. When the Roast-and-
Hold switch is turned On the switch will
illuminate and switch the power from the
thermostat to the 3 hour roast timer.
If the roast timer is in the Hold (vertical)
position the timer switch contacts will be in
their normally closed position and supply
power directly to the Hold thermostat located
behind the control panel. The Hold
thermostat is factory set to 75°C and will
supply power to the heating contactor as
required to maintain its preset temperature.
The thermostat heating light will also cycle
On/Off as the Hold thermostat maintains
temperature.
In the Roast-and Hold mode the 3 hour timer
can be set to a selected roasting time. During
this time period the normally open switch
contacts of the timer are closed. The timer
has two change over switches and in this
position one is used to supply power to its
timing motor and the other is used to switch
power directly to the main oven thermostat.
During the 3 hour timer run-down period the
oven temperature will be controlled by the
main oven thermostat to the set temperature
and operate as previously described.

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When the 3 hour timer has run down and
reached the Hold position the two switch
contacts change over to their normally closed
position which isolates power from the timer
motor and the oven thermostat. It also
switches power back to the oven hold
thermostat. At this point the temperature
control is now maintained by the hold
thermostat as previously described. To
cancel the hold circuit the Roast-and-Hold
switch is turned Off. This removes power
from the 3 hour timer and restores the feed to
the main oven thermostat. The Hold indicator
light below the 3 Hour timer will illuminate
whenever the oven is operating in hold mode
(Roast ‘n Hold selected, and 3 Hour timer at
zero position).
The factory preset hold thermostat can be
adjusted as required to change the holding
temperature if necessary. Refer Service
section for this procedure.
The Troubleshooting Guide (Section 5) should
be used to identify any incorrect oven
operation. On correct identification of the
operating fault the Troubleshooting Guide will
make reference to the corrective action
required, or refer to the Fault Diagnosis
section and/or Service section to assist in
correction of the fault.

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IMPORTANT: THIS UNIT IS NOT
WATER PROOF.
DO NOT USE A WATER JET SPRAY TO
CLEAN INTERIOR OR EXTERIOR OF
THIS UNIT.
WARNING: ALWAYS TURN THE
POWER SUPPLY OFF BEFORE
CLEANING.
EXTERIOR
Clean with a good quality stainless steel
cleaning compound. Harsh abrasive cleaners
may damage the surface.
Do not use oven cleaners or caustic solutions
to clean the control panel as these cleaners
will damage plastic components.
INTERIOR
Ensure that the oven chamber is cool. Do not
use wire brushes, steel wool or other abrasive
materials. Clean the oven regularly with a
good quality oven cleaner. Take care not to
damage the fan which has been factory
balanced.
SIDE RACKS
Remove all oven racks. Remove the side
racks by lifting out of the rack support
brackets.
LAMP GLASS
To remove glasses, unscrew anti-clockwise.
To replace, screw in clockwise.
4. MAINTENANCE
OVEN DOOR GLASS
Clean with conventional glass cleaners.
4.1 CLEANING
WARNING: ALL INSTALLATION AND SERVICE REPAIR WORK MUST BE CARRIED
OUT BY QUALIFIED PERSONS ONLY.
IMPORTANT: ENSURE THAT LAMP
GLASS IS NOT OVER TIGHTENED.
NEVER OPERATE OVEN WITH LAMP
GLASSES REMOVED
4.2 ROUTINE PROCEDURES
The following procedures should be carried
out at least once a year.
Door chain
Check for wear.
Door catch
Ensure that catch is adjusted such that the
door closes properly.
Water nozzle
Check for liming in the water nozzle.
Elements
Check element resistances are correct to
their rating.

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5. TROUBLE SHOOTING
FAULT POSSIBLE CAUSE REMEDY
THE OVEN DOES NOT
OPERATE / START
The mains isolating switch on
the wall, circuit breaker or fuses
are “off” at the power board.
The power switch on the oven is
off.
Incorrect electrical supply.
(Refer fault diagnosis 6.1.1)
Power switch on unit faulty.
(Refer fault diagnosis 6.1.1)
Turn on.
Turn on switch. Power indicator
will illuminate.
Ensure electrical supply correct.
Replace.
(Refer service section 6.3.1)
FAN DOESN’T OPERATE Thermostat not on.
(Fan only operates when the
thermostat is on).
Door not closed.
(Fan only operates when the
door is closed).
Door microswitch out of
adjustment.
(Refer fault diagnosis 6.1.2)
Door microswitch faulty.
(Refer fault diagnosis 6.1.2)
Thermostat fan switch faulty.
(Refer fault diagnosis 6.1.2)
Fan motor faulty.
(Refer fault diagnosis 6.1.2)
Wiring.
Turn thermostat on.
Close door.
Adjust microswitch.
(Refer service section 6.4.6)
Replace microswitch.
(Refer service section 6.3.17)
Replace thermostat.
(Refer service section 6.3.5)
Replace.
(Refer service section 6.3.11)
Check and tighten any loose
wiring.
NO HEAT / ELEMENTS NOT
WORKING
(FAN OPERATING BUT NO
HEATING INDICATOR)
No power to thermostat.
(Refer fault diagnosis 6.1.3)
Thermostat faulty.
(Refer fault diagnosis 6.1.3)
Identify fault and correct.
Replace.
(Refer service section 6.3.5)
NO HEAT / ELEMENTS NOT
WORKING
(HEATING INDICATOR ON)
Contactor faulty.
(Refer fault diagnosis 6.1.4)
Replace.
(Refer service section 6.3.12)
WARNING: ALL INSTALLATION AND SERVICE REPAIR WORK MUST BE CARRIED
OUT BY QUALIFIED PERSONS ONLY.

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FAULT POSSIBLE CAUSE REMEDY
OVEN LIGHT NOT
ILLUMINATING
Blown bulb.
Light switch faulty.
(Refer fault diagnosis 6.1.5)
Replace.
(Refer service section 6.3.10)
Replace.
(Refer service section 6.3.2)
NO WATER INJECTION /
STEAM
Water not turned on.
Oven water nozzle blocked.
Fault with water valve.
(Refer fault diagnosis 6.1.6)
Steam switch faulty.
(Refer fault diagnosis 6.1.6)
Turn water on at water supply.
Remove, clean or replace.
(Refer service section 6.3.14)
Service or replace as required.
(Refer service section 6.3.15,
6.3.16)
Replace.
(Refer service section 6.3.2)
CONTINUOUS WATER OUT
OF OVEN WATER NOZZLE
With oven on only—Electrical
fault.
(Refer fault diagnosis 6.1.7)
With oven on or off—Fault with
water valve.
(Refer fault diagnosis 6.1.6)
Correct electrical fault.
Service or replace as required.
(Refer service section 6.3.15,
6.3.16)
60 MINUTE TIMER WILL NOT
TIME DOWN
60 MINUTE TIMER
INACCURATE BELOW 20
MINUTES
60 MINUTE TIMER NO TIME
UP BUZZER
Timer faulty.
Timer not set correctly.
Zero (time up) position not set
correctly.
Buzzer faulty.
(Refer fault diagnosis 6.1.8)
Timer not switching on buzzer.
(Refer fault diagnosis 6.1.8)
Replace.
(Refer service section 6.3.6)
For timer settings below 20
minutes, always rotate past 20
minutes, then back to desired
time.
Adjust zero (time up) position.
(Refer service section 6.4.5)
Replace.
(Refer service section 6.3.8)
Replace.
(Refer service section 6.3.6)
60 MINUTE TIMER NO TIME
UP INDICATOR
Timer not switching on buzzer /
indicator.
(Refer fault diagnosis 6.1.8)
Indicator faulty.
Replace timer.
(Refer service section 6.3.6)
Replace indicator.
(Refer service section 6.3.3)
NO TEMPERATURE
CONTROL (TEMPERATURE
OVERRUN)
Thermostat faulty.
(Refer fault diagnosis 6.1.9)
Replace.
(Refer service section 6.3.5)

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FAULT POSSIBLE CAUSE REMEDY
SLOW RECOVERY Oven in ‘Roast ‘n Hold’ mode.
Overloading of oven.
Fan not working.
One or more elements are
faulty.
Thermostat out of calibration.
(Refer fault diagnosis 6.1.10)
Contactor faulty
(Refer fault diagnosis 6.1.10)
Switch off ‘Roast ‘n Hold’.
Reduce oven loading.
Check fan operation.
Replace element.
(Refer service section 6.3.13)
Correct calibration.
(Refer service section 6.4.3)
Replace.
(Refer service section 6.3.12)
NO THERMOSTAT HEATING
INDICATOR
Indicator faulty. Replace.
(Refer service section 6.3.4)
ROAST TIMER (180 MINUTE)
WILL NOT TIME DOWN
NO HOLD INDICATOR
HOLDING TEMPERATURE
INCORRECT
Roast ’n’ Hold switch not
switched on.
No power to timer / timer faulty.
(Refer fault diagnosis 6.1.11)
‘Roast ‘n Hold’ switch faulty.
(Refer fault diagnosis 6.1.11)
Faulty indicator.
(Refer fault diagnosis 6.1.12)
Faulty timer.
(Refer fault diagnosis 6.1.12)
Hold thermostat set
temperature incorrect.
Hold thermostat faulty.
(Refer fault diagnosis 6.1.13)
Turn on switch. Switch will
illuminate.
Correct electrical fault / replace
timer.
(Refer service section 6.3.7)
Replace.
(Refer service section 6.3.1)
Replace.
(Refer service section 6.3.3)
Replace.
(Refer service section 6.3.7)
Adjust to correct temperature.
(Refer service section 6.4.4)
Replace.
(Refer service section 6.3.9)
DOORS DO NOT CLOSE Tray in way of door.
Door catch setting incorrect.
Door chain setting incorrect.
Correctly position tray in rack.
Adjust.
(Refer service section 6.4.2)
Adjust.
(Refer service section 6.4.1)

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SECTION PAGE NO.
6.1 FAULT DIAGNOSIS..............................................................................................................19
6.1.1 Oven Does Not Operate / Start............................................................................19
6.1.2 Fan Does Not Operate.........................................................................................19
6.1.3 No Heat / Elements Not Working (Fan operates but no heating indicator) .........19
6.1.4 No Heat / Elements Not Working (Heating indicator on) .....................................19
6.1.5 Oven Lights Not Illuminating................................................................................20
6.1.6 No Water Injection / Steam..................................................................................20
6.1.7 Continuous Water Out Of Oven Water Nozzle ....................................................20
6.1.8 60 Minute Timer No Time Up Buzzer ..................................................................20
6.1.9 No Temperature Control (Temperature Overrun)................................................20
6.1.10 Slow Recovery .....................................................................................................20
6.1.11 Roast Timer (180 Minute) Will Not Time Down ...................................................21
6.1.12 No Hold Indicator .................................................................................................21
6.1.13 Holding Temperature Incorrect ............................................................................21
6.2 ACCESS ................................................................................................................................22
6.2.1 Control Panel .......................................................................................................22
6.2.2 Fan Baffle.............................................................................................................22
6.2.3 Right Hand Access Panel ....................................................................................22
6.2.4 Right Hand Side Panel.........................................................................................22
6.2.5 Bottom Lintel ........................................................................................................22
6.2.6 Control Panel (Rear) ............................................................................................23
6.3 REPLACEMENT....................................................................................................................23
6.3.1 Power / Roast Switches .......................................................................................23
6.3.2 Lights / Water Switches .......................................................................................23
6.3.3 Time Up / Roast Indicators ..................................................................................23
6.3.4 Power / Heating Indicators...................................................................................24
6.3.5 Thermostat...........................................................................................................24
6.3.6 60 Minute Timer ...................................................................................................24
6.3.7 3 Hour Timer ........................................................................................................24
6.3.8 Buzzer ..................................................................................................................25
6.3.9 Hold Thermostat ..................................................................................................25
6.3.10 Oven Lights..........................................................................................................25
6.3.11 Fan Motor.............................................................................................................25
6.3.12 Contactor..............................................................................................................26
6.3.13 Elements ..............................................................................................................26
6.3.14 Water Injection Nozzle .........................................................................................26
6.3.15 Water Solenoid Valve ..........................................................................................27
6.3.16 Water Solenoid Valve Cleaning ...........................................................................27
6.3.17 Door Microswitch .................................................................................................27
6.3.18 Door Glass ...........................................................................................................28
WARNING: ENSURE POWER SUPPLY IS SWITCHED OFF BEFORE SERVICING.
6. SERVICE PROCEDURES
WARNING: ALL INSTALLATION AND SERVICE REPAIR WORK MUST BE CARRIED
OUT BY QUALIFIED PERSONS ONLY.

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6.3.19 Door Ball Catch....................................................................................................28
6.3.20 Door Linkage Chain Assembly ............................................................................28
6.3.21 Door Assembly.....................................................................................................29
6.3.22 Top Bearing Channel ...........................................................................................29
6.4 ADJUSTMENT / CALIBRATION ..........................................................................................30
6.4.1 Door Chain...........................................................................................................30
6.4.2 Door Ball Catch....................................................................................................30
6.4.3 Thermostat Calibration.........................................................................................30
6.4.4 Hold Temperature Adjustment.............................................................................31
6.4.5 60 Minute Timer Zero Position Adjustment..........................................................31
6.4.6 Door Microswitch Adjustment ..............................................................................31

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6.1 FAULT DIAGNOSIS
Incorrect electrical supply
Check that the voltage across phase and
neutral (L1 and L2) terminals of terminal block
is the voltage as stated on the unit’s electrical
rating plate.
If incorrect, check electrical connection of
supply wiring and / or check electrical supply.
Power switch faulty
With switch on, check voltage at terminal 1 of
switch. If there is no voltage, check for fault in
wiring. Check voltage at terminal 2. If there is
no voltage then the switch is faulty - replace.
6.1.1 OVEN DOES NOT OPERATE / START
6.1.2 FAN DOESN’T OPERATE
Fan switch faulty
Check that the thermostat has power to
terminal 5 on switch body on the front of the
thermostat when power switch is ON. If no
voltage check wiring. Check that terminal P5
has power switched to it when the thermostat
is turned on. If no power to P5 then switch is
faulty and thermostat complete with switch
needs to be replaced.
Microswitch faulty / out of adjustment
Remove the right hand side panel to allow
access to the microswitch. With the
thermostat switched on and door closed,
check voltage to terminal com of microswitch.
If no voltage check wiring to thermostat.
If voltage correct then check voltage at
terminal n.c. If no voltage then manually
activate microswitch by bending the activator
arm. If microswitch cannot be activated then
it is faulty - replace. If the microswitch can be
manually activated then it should be adjusted.
6.1.3 NO HEAT / ELEMENTS NOT
WORKING (FAN OPERATES BUT NO
HEATING INDICATOR)
No power to thermostat
With the thermostat ON and the roast switch
OFF, check for power at terminal 1 of the
thermostat. If no power then check that
power is being supplied to the roast switch
(terminal 2).
Thermostat faulty
With thermostat turned on (in a cold oven)
check for voltage at terminal 2 of the
thermostat. If no voltage at terminal 2, but
voltage at terminal 1 (with thermostat turned
on) then the thermostat if faulty - replace.
Figure 6.1.1
Microswitch
com
n.c.
Fan motor faulty
Check the supply voltage across motor termi-
nals. If there is no voltage then check the
electrical connections of wiring.
If voltage is correct then check the oven fan
for free rotation. Remove any obstruction.
If fan is free to spin and the voltage at motor
terminals is correct, then the motor is faulty—
replace.
6.1.4 NO HEAT / ELEMENTS NOT
WORKING (HEATING INDICATOR
ON)
Faulty contactor
With the thermostat on check that the coil of
the heating contactor is energised (voltage
between terminals A1 and A2). Check for
output voltage from the contactor (terminals 1,
3 and 5). If no output voltage (and input to
terminals 2, 4 and 6 is correct) then the
contactor is faulty - replace.

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Revision 4/F3591 © Moffat Ltd, August 2004
6.1.5 OVEN LIGHTS NOT ILLUMINATING
Light switch faulty
Check voltage to the left hand terminal of the
switch. If there is no voltage, then check
wiring.
With switch depressed, check voltage at right
hand terminal. If there is no voltage, then
replace the switch.
If voltage is correct, then check wiring to light.
NOTE: Alternately, perform a continuity test
across the terminals with the light
switch depressed.
6.1.6 NO WATER INJECTION / STEAM
Steam switch faulty
Check voltage to the left hand terminal of the
switch. If there is no voltage, then check
wiring.
With switch depressed, check voltage at right
hand terminal. If there is no voltage, then
replace the switch.
If voltage is correct, then check wiring to the
solenoid.
NOTE: Alternately, perform a continuity test
across the terminals with the steam switch
depressed.
Fault with water valve
Check voltage supply across the water valve
solenoid coil with the steam switch depressed.
If there is no power supply then check the
control panel steam switch.
If power supply to the coil is correct,
disconnect wiring to coil and check the
resistance of the coil windings.
Correct coil resistance: 2500 ohms
NOTE: If open circuit / high resistance, then
the coil is faulty—replace.
If coil resistance is correct, rewire and listen
for an audible solenoid click when the steam
switch is depressed.
If solenoid can be heard functioning, and oven
water nozzle is not blocked, then remove
water solenoid and fittings and check for
blockages.
6.1.9 NO TEMPERATURE CONTROL
(TEMPERATURE OVERRUN)
Thermostat faulty
Set thermostat to 50°C. Check voltage at
terminal 2 on the thermostat. As the oven
heats up, the thermostat contacts should
open, cutting power to terminal 2 of the
thermostat. If not then the thermostat is faulty
- replace.
6.1.10 SLOW RECOVERY
Thermostat out of calibration
Place an accurate digital thermometer probe
in centre of oven. Set thermostat to 180°C.
Close the oven door and allow oven
thermostat to cycle on and off twice. Record
oven centre temperature for the next
6.1.7 CONTINUOUS WATER OUT OF
OVEN WATER NOZZLE
Water solenoid electrical fault
With control panel steam switch not
depressed, check for power supply across
solenoid coil. If there is power to the coil, then
check wiring and steam switch (refer 6.1.7).
6.1.8 60 MINUTE TIMER NO TIME UP
BUZZER
Buzzer faulty
With timer in ‘zero’ position, check the buzzer
at side of control panel (inside) for voltage
across terminals. If voltage is correct then
buzzer is faulty—replace.
If there is no voltage, then check wiring..
Timer not switching on buzzer
With timer in zero position, check voltage to
top connection (terminal one) and bottom
connection (terminal two) of timer. If there is
no voltage at terminal one then check wiring.
If no voltage at terminal two then timer is
faulty—replace.
NOTE: Timer will continue to run
approximately three minutes below zero.
Buzzer and time up indicator will continue until
the timer is manually switched off (to vertical
position).